Pokemon Challenge - Can I Beat Pokemon Y with a Single Vivillon?

We're back in the beautiful Kalos region and once again, we're setting out to try and conquer. In our corner, we have the regional... and only... bug. How good is Vivillon really? Can I beat Pokemon Y using just one in combat, with only held items and poke balls? Links YouTube Page    / mightybluebongo   Twitter Link   / onceandg   Discord Link   / discord   Patreon Link https://patreon.com/user?u=81494015